English Reference
adjective

dubious

adj.
US /ˈdubiəs/ UK /djˈuːbɪəs/ du·bi·ous

  1. 01 B2 Upper Intermediate

    something that is probably not honest, true, or safe.

    arousing doubt or suspicion; of questionable value, quality, or legality.

    Simple

    The company made some dubious claims about how much money you could earn.

    In context

    The startup's valuation was based on dubious accounting practices that eventually drew the attention of federal regulators.

  2. 02 B2 Upper Intermediate

    feeling unsure or not certain that something is a good idea.

    hesitating or wavering in opinion; inclined to doubt or feeling undecided.

    Simple

    I was dubious about his plan to drive across the country in such an old car.

    In context

    Local residents remain dubious about the proposed development, fearing it will destroy the quiet character of the neighbourhood.

  3. 03 C1 Advanced Formal

    having a result or quality that is not very good or is disappointing.

    of uncertain outcome or questionable merit; often used in the phrase 'dubious honour' to describe something unwanted.

    Simple

    The team had the dubious honour of losing every single game this season.

    In context

    He holds the dubious distinction of being the only minister to be fired twice for the same administrative error.

    unpromisingpoor

Donovan, Noel’s oldest, is given the dubious honour of the story of his night getting “absolutely spangled” and puking in a taxi being shared with millions.

The Guardian· 8 Sept 2026

Etymology tree Latin dubiusbor. English dubious From Latin dubius; like doubt, from Latin duo (cognate to English two), implying “two alternatives” (yes or no, true or false, etc.).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin duo
Level B2 · Upper Intermediate
Frequency Frequent
Updated